/*
 * yidingliu.com Inc. * Copyright (c) 2016 All Rights Reserved.
 */

package org.chris.quick.m.glide;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;

import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;

/**
 * Description:圆角图片的处理工具
 * User: hzm
 * Date: 2016/8/31 0031
 * Time: 15:42
 */
public class GlideRoundTransform extends BitmapTransformation {

    private static float radius = 0f;

    public GlideRoundTransform (Context context ) {
        this(context, 4);
    }

    public GlideRoundTransform ( Context context, int dp ) {
        super(context);
        this.radius = Resources.getSystem ().getDisplayMetrics ().density * dp;
    }

    @Override
    protected Bitmap transform ( BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight ) {
        return roundCrop(pool, toTransform);
    }

    private static Bitmap roundCrop ( BitmapPool pool, Bitmap source ) {
        if (source == null) return null;

        Bitmap result = pool.get ( source.getWidth (), source.getHeight (), Bitmap.Config.ARGB_8888 );
        if (result == null) {
            result = Bitmap.createBitmap ( source.getWidth (), source.getHeight (), Bitmap.Config.ARGB_8888 );
        }

        Canvas canvas = new Canvas ( result);
        Paint  paint  = new Paint ();
        paint.setShader (new BitmapShader ( source, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP) );
        paint.setAntiAlias(true);
        RectF rectF = new RectF ( 0f, 0f, source.getWidth (), source.getHeight ());
        canvas.drawRoundRect(rectF, radius, radius, paint);
        return result;
    }

    @Override public String getId () {
        return getClass().getName() + Math.round ( radius );
    }
}
